liamwhite
GitHub
commit
22492b68b7
@ -0,0 +1,93 @@
|
||||
// SPDX-FileCopyrightText: 2024 yuzu Emulator Project
|
||||
// SPDX-License-Identifier: GPL-2.0-or-later
|
||||
|
||||
#pragma once
|
||||
|
||||
#include <condition_variable>
|
||||
#include <mutex>
|
||||
|
||||
#include "common/intrusive_list.h"
|
||||
|
||||
namespace Common {
|
||||
|
||||
class ScopedRangeLock;
|
||||
|
||||
class RangeMutex {
|
||||
public:
|
||||
explicit RangeMutex() = default;
|
||||
~RangeMutex() = default;
|
||||
|
||||
private:
|
||||
friend class ScopedRangeLock;
|
||||
|
||||
void Lock(ScopedRangeLock& l);
|
||||
void Unlock(ScopedRangeLock& l);
|
||||
bool HasIntersectionLocked(ScopedRangeLock& l);
|
||||
|
||||
private:
|
||||
std::mutex m_mutex;
|
||||
std::condition_variable m_cv;
|
||||
|
||||
using LockList = Common::IntrusiveListBaseTraits<ScopedRangeLock>::ListType;
|
||||
LockList m_list;
|
||||
};
|
||||
|
||||
class ScopedRangeLock : public Common::IntrusiveListBaseNode<ScopedRangeLock> {
|
||||
public:
|
||||
explicit ScopedRangeLock(RangeMutex& mutex, u64 address, u64 size)
|
||||
: m_mutex(mutex), m_address(address), m_size(size) {
|
||||
if (m_size > 0) {
|
||||
m_mutex.Lock(*this);
|
||||
}
|
||||
}
|
||||
~ScopedRangeLock() {
|
||||
if (m_size > 0) {
|
||||
m_mutex.Unlock(*this);
|
||||
}
|
||||
}
|
||||
|
||||
u64 GetAddress() const {
|
||||
return m_address;
|
||||
}
|
||||
|
||||
u64 GetSize() const {
|
||||
return m_size;
|
||||
}
|
||||
|
||||
private:
|
||||
RangeMutex& m_mutex;
|
||||
const u64 m_address{};
|
||||
const u64 m_size{};
|
||||
};
|
||||
|
||||
inline void RangeMutex::Lock(ScopedRangeLock& l) {
|
||||
std::unique_lock lk{m_mutex};
|
||||
m_cv.wait(lk, [&] { return !HasIntersectionLocked(l); });
|
||||
m_list.push_back(l);
|
||||
}
|
||||
|
||||
inline void RangeMutex::Unlock(ScopedRangeLock& l) {
|
||||
{
|
||||
std::scoped_lock lk{m_mutex};
|
||||
m_list.erase(m_list.iterator_to(l));
|
||||
}
|
||||
m_cv.notify_all();
|
||||
}
|
||||
|
||||
inline bool RangeMutex::HasIntersectionLocked(ScopedRangeLock& l) {
|
||||
const auto cur_begin = l.GetAddress();
|
||||
const auto cur_last = l.GetAddress() + l.GetSize() - 1;
|
||||
|
||||
for (const auto& other : m_list) {
|
||||
const auto other_begin = other.GetAddress();
|
||||
const auto other_last = other.GetAddress() + other.GetSize() - 1;
|
||||
|
||||
if (cur_begin <= other_last && other_begin <= cur_last) {
|
||||
return true;
|
||||
}
|
||||
}
|
||||
|
||||
return false;
|
||||
}
|
||||
|
||||
} // namespace Common
|
||||
Loading…
Reference in New Issue